Fed-Batch Reactor with Multiple Reactions

The fed-batch reactors considered in Sections 4.1, 4.2, and 4.6 all involved single reactions. The control problem was to prevent reaction temperature mnaways. In fed-batch 

TABLE 4.1 Parameters of Fed-Batch Reactor with Multiple Reactions 

There are two reactions with different reaction rates and activation energies. The first reaction produces the desired product C from the reaction of components A and B  

An initial charge of component A (5 m3 with concentration 0.5 kmol/m3) is placed in a 7.5-m3 reactor. Component B is fed into the reactor at a flowrate FU) (m3/min), which can be a function of time. The initial concentration of B in the reactor is zero, but the concentration builds up with time as pure B is fed (CBo = 5 kmol/m3). Table 4.1 gives the values of the kinetic and process parameters. 

The second reaction produces an undesirable product D from the reaction of component B  

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Suspension polymerization of vinyl monomers is usually carried out in batch reactors. However, the feasibility of continuous suspension polymerization has been reported in some literature. A multiple-reactor system for continuous suspension polymerization of vinyl chloride is illustrated in Fig. 6 [15]. Monomer, water, initiator, and suspending agents are fed to a vertical tower reactor equipped with a multistage stirrer. The reaction mixture of about 10% conversion is then transferred to the second and third reactors, which contain blade stirrers. Each reactor is jacketed for heat removal. Plug flow of the polymerization mixture is maintained in the reaction zones. 

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